CodyPereira21

New member
May 15, 2025
4
Southbury, CT
Pool Size
33000
Surface
Vinyl
Chlorine
Liquid Chlorine
Hi All,

After reading many posts on this forum I figured I should probably join and help contribute to the community through some of my own experiences. I bought my first home 5 years ago that included an IG 20x40 vinyl lined pool sporting the trusty Hayward EC65 DE filter coupled with a Hayward 1.5HP pump. Having not owned a pool prior and only watching family members in the past operate and maintain their own pools, there was much to learn. After getting over the learning curve of the DE filter, chemistry and winterization, I have to say that besides the maintenance, it really does leave a crystal clear pool throughout the year.

This year was a bit of a curveball. In an attempt to get ahead of the warm spell we had early last year that had me fighting algae blooms - we decided to open up at the end of April this year. Water clarity was much better, however our metals were way off according to the local pool store where we have water samples tested at the begging of the season. (I test weekly thereafter to make any necessary chemistry tweaks.) After adding chemicals, our water turned cloudy and won't clear. My trusty filter has been becoming clogged after a few hours, and even after bumping, has required backwashing and even two disassembly's already in the past few weeks to remove anything that could be clogging things up. I have gone through over 25 lbs of DE ALREADY this season due to high filter pressures... that's nuts.

A few things of note:
  • Prior to starting the filtration system, I ran my pool robot a few times through to capture large particulate/debris off the bottom as to not overtax the filter.
  • Filter is cleaned at the beginning of each season with a 10% muriatic acid soak overnight, and thoroughly washed thereafter.
  • Filter is not ran without DE in the system
  • 6lbs of DE for initial coating, 4 lbs added after for refill following backwash procedure.
I am losing my mind this season (and my fiancé losing hers too) with having to bump and backwash constantly. Are there any other helpful tips that I am missing?

I am an engineer by trade and this year's experience has me thinking about designing a type of "prefilter" I can plumb into the system for future seasons to aid in removal of larger particulates prior to hitting the DE filter itself... Anyone had any luck with something like that?

Thanks in advance folks.
 
Hey Cody and Welcome !!!

Step 1 with quick filter cycles is an Overnight Chlorine Loss Test. It's almost always a chemical problem, not a mechanical one.

Even if THIS is the one time that is a mechanical problem (seriously the one and only time) you still need to prove we have time to fiddle with the mechanicals without a swamp risk.
 
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Hey Cody and Welcome !!!

Step 1 with quick filter cycles is an Overnight Chlorine Loss Test. It's almost always a chemical problem, not a mechanical one.

Even if THIS is the one time that is a mechanical problem (seriously the one and only) you still need to prove we have time to fiddle with the mechanicals without a swamp risk.
Thank you! I will read up on that link and conduct those tests - reporting back results when available. I think you are right with the unlikelyhood of a mechanical problem - I just rebuilt the top end of the EC65 last season after noticing a crack in one of the flex tube assembly plates and also installed a new diaphragm gasket while I was there. Performed like a top the remainder of the season.
 
I think you are right with the unlikelyhood of a mechanical problem
Nobody wants to hear they have algae, but look at it from a different angle. Your filter isnt broken, its working amazing and clogging up in no time. :ROFLMAO:

Or pass the OCLT and then we can fiddle further.
 
Nobody wants to hear they have algae, but look at it from a different angle. Your filter isnt broken, its working amazing and clogging up in no time. :ROFLMAO:

Or pass the OCLT and then we can fiddle further.
It's a good point - the filter is technically doing exactly what it is supposed to do...filter! I am going to try and do that test tonight. Over the past week, we have put in over 10 gallons of liquid chlorine, 5 of which was yesterday evening after seeing there was almost no FC on a test strip, being confirmed by the pool water sample at the pool store.
 
How are you testing your water?
To do OCLT and to SLAM, you need one of our recommended kits. Link-->Test Kits Compared
I am going to look into those test kits this weekend. I tested for my Chlorine levels last night and they were through the roof... 10ppm based on the test kit I currently have (snip below)
1747394167223.png
 

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I want to love those kits because I like the colored plastic instead of a sticker, but unfortunately they are awful. They cheaped out on the pH reagent and it starts to get unreliable with as little as 3 ppm chlorine in the water. Then the OTO chlorine test that's very vague in the best kits is somehow made even less useful in this one. It was obviously built down to a very low price and sadly that made it about as useful as a test strip.